PROCESS FOR REFINING A HEAVY HYDROCARBON FEED USING A SELECTIVE DEASPHALTING STEP

摘要

The invention concerns a process for refining a heavy hydrocarbon feed, comprising the following steps:
a) a step for selective deasphalting of the heavy hydrocarbon feed by single-step liquid/liquid extraction in an extraction medium, said extraction being carried out using a mixture of at least one polar solvent and at least one apolar solvent, in order to obtain an asphalt phase and a deasphalted oil phase DAO, the proportions of said polar solvent and said apolar solvent in the solvent mixture being adjusted as a function of the properties of the feed and the desired asphalt yield, said deasphalting step being carried out under subcritical conditions for the solvent mixture;b) a step for hydrotreatment of at least a portion of the deasphalted oil phase DAO obtained from step a);c) optionally, a step for catalytic cracking of at least a portion of the effluent obtained from step b).

主权项

1. A process for refining a heavy hydrocarbon feed, comprising the following steps:
a) a step for selective deasphalting of the heavy hydrocarbon feed by single-step liquid/liquid extraction in an extraction medium, said extraction being carried out using a mixture of at least one polar solvent and at least one apolar solvent, in order to obtain an asphalt phase and a deasphalted oil phase DAO, the proportions of said polar solvent and said apolar solvent in the solvent mixture being adjusted as a function of the properties of the feed and the desired asphalt yield, said deasphalting step being carried out under subcritical conditions for the solvent mixture; b) a step for hydrotreatment of at least a portion of the deasphalted oil phase DAO obtained from step a) in the presence of hydrogen in at least one fixed bed reactor containing at least one hydrodemetallization catalyst under conditions which can be used to obtain an effluent with a reduced metals content and Conradson Carbon Residue; c) optionally, a step for catalytic cracking of at least a portion of the effluent obtained from step b) in at least one fluidized bed reactor under conditions for producing a gaseous fraction, a gasoline fraction, a LCO fraction, a HCO fraction and slurry.